MALAC0Z0A. GASTEROPODA. PECTIN IBRANCHIATA. 159 



the edge of the whorls simply incurved ; the aperture narrow- 

 oblong, much narrowed behind by the convexity of the last 

 turn, the outer lip extremely thin, the columella with an ob- 

 scure obtuse plait.; the colour hyaline-white, with two very 

 faint reddish bands on the last whorl. Length two-and-a-half 

 twelfths, breadth one-and-a-half twelfths. 



The above description from a specimen from the Bay of 

 Aberdeen, found by me in a fish-basket, in the middle of Oc- 

 tober, 1842. 



It closely resembles a young Tornatella fasciata of the same 

 size, but differs in having the spire longer and more pointed, 

 in wanting the channel in the suture formed by the involution 

 of the spiral turns, in having two impressed lines near the 

 posterior margin of the turns, and in being differently coloured. 

 The three reddish bands however are analogous to the reddish 

 spaces between the white bands in Tornatella fasciata. 



Risso's account of Speo tornatilis does not agree with the 

 present species ; but his notices are very frequently incorrect, 

 and his description of Speo bifasciata, which is Voluta Torna- 

 tilis of Linnaeus, is very imperfect. 



The transition from this species to the genus Odostomia is 

 almost direct. 



3. Tornatella pusilla. Diminutive Tornatella. 



Shell ovato-conical, subfusiform, very thin, transparent, 

 glossy, with the spire tapering to an obtuse point; the turns 

 four, little convex, the last turn about thrice as broad as the 

 length of the spire, marked with longitudinal punctulate striae, 

 which are stronger at the anterior part, obsolete and distant on 

 the upper two-thirds, crowded toward the suture, which is 

 distinct ; the aperture narrow-oblong, much narrowed behind 

 by the convexity of the last turn, the outer lip extremely thin, 

 the columella with an inconspicuous oblique obtuse plait or 

 nodosity terminating the inner lip ; the colour hyaline-white. 

 Length one-twelfth of an inch, breadth half the length. 



This species has the spire shorter than the two preceding, 

 and is narrower than Tornatella pellucida. It seems to agree 

 in most respects with Turton's Voluta fusiformis, but differs in 

 being only a third of the size, and spirally striate. 



Voluta fusiformis. Turk Conch. Diet.? — Acteon fusiformis. 

 Flem. Brit. Anim. 337 ? 



Many specimens of Tornatella fasciata are equally or mora 



